I want to convert FLV files to M4V files. What is the
exec (PHP) Linux code for this conversion?
In the most simple case:
This will copy the raw video stream, discard audio, and change the container.
Just wrap this in your PHP
Don't forget to update FFmpeg to the latest version depending on your operating system. And, as @soandos mentioned, check out my blog post on that subject: FFmpeg: The ultimate Video and Audio Manipulation Tool - Super User Blog